11
2.4.1 Alarm Connection Procedure
Before making any connections to the TPSD2, ensure that the AC power is off at the main breaker box and the
charger’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and output terminals.
For relays mentioned as ENERGIZED on alarm condition:
If it is desired that the annunciator be active until the alarm triggers, connect the annunciator leads to the
NC
and
C
contacts of the desired alarm (located on the relay alarm contacts on S2A-198 board). If it is
desired that the annunciator be deactivated until the alarm triggers, connect the annunciator leads to the
NO
and
C
contacts of the desired alarm.
For relays mentioned as DE-ENERGIZED on alarm condition:
If it is desired that the annunciator be active until the alarm triggers, connect the annunciator leads to the
NO
and
C
contacts of the desired alarm (located on the relay alarm contacts on S2A-198 board). If it is
desired that the annunciator be deactivated until the alarm triggers, connect the annunciator leads to the
NC
and
C
contacts of the desired alarm.
EXAMPLE:
A customer wants a green lamp to be illuminated
at all times and wants a red lamp to illuminate and a speaker
to sound when the Summary alarm triggers. The customer
would make the connections to the NC and C contacts on one
set of the Summary relay contacts between the speaker and a
power supply. On the other set of Summary relay contacts,
the customer would connect the NO and C contacts between
the green lamp and power supply, and would connect the NC
and C contacts between the red lamp and power supply. Refer
to Figure 10.
Figure 10 – Example Connections
(Customer Provided Equipment)
S2A-198 Relay Information
Relay Function
Logic
AC Power Fail
De-Energize on Fail
Summary
De-Energize on Fail
High DC Voltage
Shutdown
Energize on Fail
Low DC Current
De-Energize on Fail
High DC Voltage
Energize on Fail
Low DC Voltage
De-Energize on Fail
End of Discharge
De-Energize on Fail
Positive Ground
Energize on Fail
Negative Ground
Energize on Fail
Table 7 – Alarms Relay Logic
Load Resistive Load (P.F. = 1)
Contact Material Ag (Au clad)
Maximum Allowed Current 2 A
Max. Operating Voltage and
Current
0.5 A at 125 VAC
0.6 A at 110 VDC
2.0 A at 30 VDC
Max. Switching Capacity
62.5 VA
60 W
Min. Permissible Load 10 µA / 10 mVDC
Table 8 – Alarm Contact Specifications
